5) remove the grounding short circu

5) remove the grounding short circuit of the motor cooler and mark it;6) remove the connecting bolts between the motor cooler and the stator, and number the bolts in sequence;7) use the monorail crane above the motor to repair the open space beside the cooler motor, and use sleepers under the cooler to level, which shall not affect the hoisting and transportation space of other maintenance work;8) cover the top of the motor stator temporarily, so that the stator coil can be heated at any time. One layer of aluminum foil paper and two layers of plastic film are used for the cover, and the cover is made into grid like reinforcement with tape, and the four sides are sealed with tape;9) check and clean the cooler: mainly clean the dirt accumulated in the shell, tube side and head of the cooler; check the internal structure of the cooler for deformation, fracture and looseness; check the cooler itself for scale, rust, blockage and leakage;